An Oahu grand jury returned an indictment Wednesday charging a man with assault and other crimes in connection with an apparent unprovoked attack last week of a junior high school football coach at a traffic light.

The indictment charges Roberto Reymundo Smith, 41, of Salt Lake, with unauthorized entry into a motor vehicle, second-degree assault, third-degree assault, use of a butterfly knife in the attacks and first-degree terroristic threatening. Smith remains in custody unable to post $25,000 bail.

Paul Brown, assistant offensive line coach for the Pac-Five intermediate football team said he was waiting at a stop light outside Mid-Pacific Institute after practice  June 22 when a man tried to punch and stab him through his pickup truck’s open door window.

Brown said he opened his door, knocking his attacker to the ground.

Vickie Kapp, deputy city prosecutor, said Brown wrestled with Smith on the ground and during the struggle Smith stabbed Brown in the leg.

Other coaches who witnessed what happened went to Brown’s assistance including Edward Edra, the team’s defensive coordinator.

Police said Edra sustained a cut to his hand while attempting to take the butterfly knife out of Smith’s hand.